Probably depends on your goals. Since you already know the most popular language in the world, it doesn't seem like there's much point in learning either of them just to extend the number of people you can communicate with. For that reason it would make sense to learn Chinese or Spanish.
To me the appeal of Lojban is in "expanding your mind" and using different tools for thinking.
Also, I've recently read somewhere people recommending to learn a sign language, so that is a thing you might want to consider. They say that it is easy to learn and is very different from English(hence - interesting).
To me the appeal of Lojban is in "expanding your mind" and using different tools for thinking.
Also, I've recently read somewhere people recommending to learn a sign language, so that is a thing you might want to consider. They say that it is easy to learn and is very different from English(hence - interesting).